Squeezing of shock waves

Shock waves emerge in various fields and trigger effects like rogue waves, supercontinuum generation and emission of resonant radiation. Despite shock waves ubiquity, their effect on the coherence properties is barely understood. Among the open problems, the quantum features of shock waves are particularly intriguing for the possibility of generating non-classical states by highly nonlinear regimes. In a manuscript in arXiv, Maria Chiara Braidotti, Antonio Mecozzi, and Claudio Conti theoretically predict classical squeezing of light during shock formation. The picture above shows the Wigner transform of the field in the squeezed regime. By using techniques of rigged Hilbert space quantum mechanics, they show that a coherent state develops squeezing which stops in proximity of the shock point. The analysis holds true for temporal and spatial shock waves in highly nonlocal regime.These results open a new scenario in shock phenomena and link nonlinear propagation in extreme regimes with quantum optics and related applications.

Press release on the VANGUARD project

At minute 7,15

http://www.rai.tv/dl/RaiTV/programmi/media/ContentItem-e68ee104-eb80-4fbd-8968-2db15618c55f-tgr.html?refresh_ce#p=0

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The results of the team of the Vanguard project presented at at the 60th annual meeting of the Biophysical Society, in Los Angeles appeared in Physics World

http://physicsworld.com/cws/article/news/2016/mar/03/tapping-into-graphene-oxides-antibacterial-properties-to-fight-infections !!!

http://nanotechweb.org/cws/article/tech/64211

http://www.azonano.com/news.aspx?newsID=34445

https://cosmosmagazine.com/technology/five-new-uses-miracle-material-graphene

http://www.techtimes.com/articles/138537/20160305/graphene-oxides-antibacterial-properties-may-help-combat-hospital-acquired-infections.htm

http://healthfinder.pw/graphene-oxides-antibacterial-properties-may-help-combat-hospital-acquired-infections/

http://www.directorstalk.com/graphene-oxide-could-help-fight-hospital-acquired-infections-2/

http://www.milanofinanza.it/articoli/i-nuovi-killer-di-batteri-2075304?preview=false&access=FA

The research has been spotted by the Dailymail !

Other press release:

http://www.ansa.it/scienza/notizie/rubriche/tecnologie/2016/03/29/il-grafene-killer-dei-batteri_4dcdc948-6862-46eb-a1b8-93dac47ffb2a.html

http://www.liberoquotidiano.it/news/salute/11893222/Funghi-e-batteri-killer-in-ospedale.html

http://www.corriere.it/notizie-ultima-ora/Scienza_e_salute/Grafene-puo-diventare-disifettante/29-03-2016/1-A_022733436.shtml

http://www.repubblica.it/salute/ricerca/2016/03/31/news/dalla_matita_all_ospedale_il_grafene_diventa_un_disinfettante-136757741/

http://www.e-gazette.it/sezione/tecnologia/grafene-potrebbe-essere-disinfettante-futuro-dice-studio-italiano-presentato-los-#.VwPE7CZxPQM.email

Press Release in Italian “Donna del Corriere della Sera”

DonnaCorriereSera

Press release in the Netherlands

NetherlandsGraphene

Press release in Japan !

Japanese

 

Solitonization of Anderson localisation and optical-event horizons

In a paper in arXiv, Mohammed F. Saleh, Claudio Conti and Fabio Biancalana show that the solitonization of the Anderson localization and the formation of optical horizons by cluster of solitons explain the rogue-solitons in supercontinuum generation.

This is complex photonics !

Turbulent Transitions in Optical Wave Propagation

In a paper published in Phys. Rev. Lett. , D. Pierangeli, F. Di Mei,  G. Di Domenico, A. J. Agranat, C. Conti, and E. Del Re, report the direct observation of the onset of turbulence in propagating one-dimensional optical waves. The transition occurs as the disordered hosting material passes from being linear to one with extreme nonlinearity. As the response grows, increased wave interaction causes a modulational unstable quasihomogeneous flow to be superseded by a chaotic and spatially incoherent one. Statistical analysis of high-resolution wave behavior in the turbulent regime unveils the emergence of concomitant rogue waves. The transition, observed in a photorefractive ferroelectric crystal, introduces a new and rich experimental setting for the study of optical wave turbulence and information transport in conditions dominated by large fluctuations and extreme nonlinearity.